Thanks Ian. Yes this is C and no am not using the -fno-common option. However, DECL_COMMON is returning non-zero for both cases. Its zero only for a declaration that includes 'static'. Zahed On Wed, Apr 4, 2012 at 2:39 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > zahed khurasani <sdzahed@xxxxxxxxx> writes: > >> How can I distinguish between the following two declarations (both >> appear outside any function at file scope)? >> >> extern int i; >> int i; >> >> Both show up as VAR_DECL nodes in the BLOCK_VARS of the >> TRANSLATION_UNIT_DECL. Moreover, both return true for DECL_EXTERNAL. I >> need a way to say which is which in my plugin code. > > I assume this is C, not C++, and that you are not using the -fno-common > option. The "int i;" will be DECL_COMMON. > > Ian
